English Name: Sodium thiosulfate
Molecular Formula: Na2S2O3.5H2O
Molecular Weight: 248
Property: Colorless crystal. Odorless, with bitter smell. Relative density 1.729 （ 17℃ ）. Melting Point 40-50℃ .
Use: For photographic fixer, electroplating, leather, reducing agent, dyeing dechlorination agent, sulfur dyes, anti-white, disinfectants and bleaching agents industry..
Specification:
|
Index Name
|
Unit
|
Standard Value
|
|
Sodium thiosulfate（Na2S2O3.5H2O） Content
|
%≥
|
99.0
|
|
Water insolubilities Content
|
%≤
|
0.01
|
|
Sulfate matters （counted with Na2S ） Content
|
%≤
|
0.001
|
|
Iron （ Fe ） Content
|
%≤
|
0.002
|
|
PH Value （ 200g /l solution）
|
|
6.5～9.5
|
Package: 25kg , 50kg plastic woven bags.
|
